4_2025_sen_6

Title of the article APPLICATION OF THE TIME SYNCHRONOUS AVERAGING METHOD IN VIBRATION DIAGNOSTICS OF TRANSMISSION SYSTEMS OF MOBILE MACHINES
Authors

ISHIN Nikolay N., D. Sc. in Eng., Assoc. Prof., Chief of the R&D Center “Mining Machinery”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

GOMAN Arkadiy M., Ph. D. in Eng., Assoc. Prof., Head of the Department of Dynamic Analysis and Vibration-based Diagnostics of Machines of the R&D Center “Mining Machinery”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

SKOROKHODOV Andrey S., Ph. D. in Eng., Assoc. Prof., Leading Researcher of the Department of Dynamic Analysis and Vibration-based Diagnostics of Machines of the R&D Center “Mining Machinery”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

LOGVINETC Tatyana S., M. Sc. in Eng., Researcher of the Department of Dynamic Analysis and Vibration-based Diagnostics of Machines of the R&D Center “Mining Machinery”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section DYNAMICS, DURABILITY OF VEHICLES AND STRUCTURES
Year 2025
Issue 4(73)
Pages 43–51
Type of article RAR
Index UDK 621.833.65: 534
DOI https://doi.org/10.46864/1995-0470-2025-4-73-43-51
Abstract The properties of the time synchronous averaging method, aimed at identifying informative components in the process of gear diagnostics, are considered, which makes it possible to improve the signal-to-noise ratio of the vibration signal and determine which element of a transmission unit with several rotating shafts is the source of increased vibration. This method of processing the vibroacoustic signal also makes it possible to assess the condition of individual elements of gear systems. The relevance of using the time synchronous averaging method in vibration diagnostics of transmission systems of mobile machines is shown, due to the possibility of averaging signals both for stationary processes and at varying rotational speeds. The algorithm of the time synchronous averaging method used in the vibration monitoring system of gear drives developed by the Joint Institute of Mechanical Engineering of the NAS of Belarus is described. As part of the further development of the comprehensive methodology developed by the authors for detecting, localizing and identifying incipient gear damage, the use of a number of dimensionless discriminants in vibration diagnostics of a planetary gearbox is considered. As an example of their application, the analysis of experimental data obtained as a result of vibration monitoring of the technical condition of the motor-wheel gearbox of a mining dump truck is given.
Keywords mobile machine, gear system, gear transmission, technical condition, vibration, time synchronous averaging
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4_2025_sen_5

Title of the article COMPUTATIONAL AND EXPERIMENTAL METHODS FOR STUDYING THE AERODYNAMIC CHARACTERISTICS OF WHEELED VEHICLES AND THEIR COMPONENTS
Authors

KARABTSEV Vladimir S., Ph. D. in Eng., Assoc. Prof., Head of the Design and Research Calculations Department, KAMAZ PTC, Naberezhnye Chelny, Republic of Tatarstan, Russian Federation; Associate Professor of the Information Systems Department, Naberezhnye Chelny Institute of Kazan Federal University, Naberezhnye Chelny, Republic of Tatarstan, Russian Federation; This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

In the section COMPUTER MECHANICS
Year 2025
Issue 4(73)
Pages 31–42
Type of article RAR
Index UDK 629.01.02
DOI https://doi.org/10.46864/1995-0470-2025-4-73-31-42
Abstract Aerodynamics have an impact on many consumer properties of vehicles and their components — fuel consumption, appearance, dynamics, vehicle steerability, comfort of the driver and passengers, and safety. Therefore, developers spend huge amounts of money on blowing full-scale samples and scale models in wind tunnels and conducting laboratory and road tests on landfill roads. Numerical modeling using powerful computers is becoming increasingly widespread, aimed at fine-tuning the shape of vehicle cabins and external aerodynamic devices at the early stages of design. The article provides an overview of experimental research methods for the aerodynamic characteristics of vehicles and their components and the obtained research results.
Keywords wheeled vehicle, aerodynamic characteristics, research methods, testing of full-scale samples and models, coefficient of aerodynamic resistance, run-out, pressure distribution
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4_2025_sen_3

Title of the article EXPERIENCE IN DESIGNING UNMANNED TRANSPORT VEHICLES AND PROSPECTS FOR THEIR USE IN CONSTRUCTION
Authors

BELEVICH Alexander V., Deputy Director General for Highly Automated Electric Transport – Chief of the R&D Center “Electromechanical and Hybrid Power Units of Mobile Machines”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

CHARAPOK Artem V., Head of the Top-Level System Design Division of the Applied Research Laboratory for Research, Design and Testing of Electric Vehicles and Basic Electric Drive Components of the R&D Center “Electromechanical and Hybrid Power Units of Mobile Machines”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

VYSOTSKIY Oleg P., Head of the Software Development Department for Microprocessor Systems of the R&D Center “Electromechanical and Hybrid Power Units of Mobile Machines”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

KRAVTSOV Ivan P., Head of the Industrial Robotics Department of the R&D Center “Electromechanical and Hybrid Power Units of Mobile Machines”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MECHANICS OF MOBILE MACHINES
Year 2025
Issue 4(73)
Pages 18–24
Type of article RAR
Index UDK 621.8:004.8
DOI https://doi.org/10.46864/1995-0470-2025-4-73-18-24
Abstract The current stage in the development of unmanned transport vehicles is characterized by a shift from public mobility to specialized applications in controlled environments. This article analyzes promising directions in the development of unmanned technologies in mechanical engineering. Modern achievements in the automation of three key sectors are systematized: agriculture, mining, and construction. Based on a comparative analysis of international experience and literature sources, characteristic features of each sector are identified: in agriculture, there is a transitional stage from automatic driving systems to full autonomy; in the mining industry, successful industrial implementation of unmanned systems with proven economic efficiency is demonstrated; and in construction, a significant potential for integrating robotic complexes with BIM technologies is revealed. Special attention is paid to legal and infrastructural limitations hindering the widespread adoption of autonomous transport in logistics and passenger transportation. The article presents research results and practical developments in creating unmanned transport vehicles for restricted-access sectors, carried out by specialists of the Joint Institute of Mechanical Engineering of the NAS of Belarus. The research outcomes justify focusing efforts on developing robotic complexes for applications in restricted environments, representing a strategic interest for the development of domestic mechanical engineering.
Keywords unmanned vehicles, robotic complexes, autonomous systems, agricultural robotics, mining dump trucks, construction automation, BIM modeling
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4_2025_sen_4

Title of the article METHOD AND SOFTWARE IMPLEMENTATION OF KINEMATIC ANALYSIS OF A ROCKER MECHANISM
Authors

KOTOV Andrey V., M. Sc. in Eng., Leading Design Engineer, JSC “Seismotekhnika”, Gomel, Republic of Belarus; Postgraduate Student of the Department “Mechanics”, Sukhoi State Technical University of Gomel, Gomel, Republic of Belarus; This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

KROL Dmitriy G., Ph. D. in Phys. And Math., Assoc. Prof., First Vice-Rector, Sukhoi State Technical University of Gomel, Gomel, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section COMPUTER MECHANICS
Year 2025
Issue 4(73)
Pages 25–30
Type of article RAR
Index UDK 621.01 + 631.354
DOI https://doi.org/10.46864/1995-0470-2025-4-73-25-30
Abstract An analytical method of kinematic analysis of the rocker mechanism of the reaping part of a grain harvester using the theory of complex numbers, as well as an algorithm and its software implementation are presented. The use of complex numbers in the kinematic analysis of lever mechanisms makes it possible to optimize mathematical calculations by performing only elementary operations of addition (subtraction) and multiplication of complex numbers. An example of graphical visualization of the results of kinematic analysis in the mathematical package PTC MathCAD is given. The proposed method of kinematic analysis of plain lever mechanisms using the theory of complex numbers can find its effective application in relevant engineering and scientific calculations.
Keywords rocker mechanism, reaping part, kinematic analysis, complex numbers, coordinate transformation method, algorithm
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4_2025_sen_2

Title of the article THE CONCEPT OF A HYBRID COOLING SYSTEM FOR A SPARK-IGNITION TWO-STROKE ENGINE FOR UAV
Authors

KOCHETOV Nikolay V., Ph. D. in Eng., Assoc. Prof., M. Sc. in Economics, Leading Researcher of the Research Department, JSC “Instrument-Making Plant Optron”, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

PADAROZHNIAYA Iryna V., M. Sc. in Eng., Researcher of the Research Department, JSC “Instrument-Making Plant Optron”, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

MIRANOVICH Oleh L., Ph. D. in Eng., Assoc. Prof., Head of Research Department, JSC “Instrument-Making Plant Optron”, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section GENERAL ISSUES OF MECHANICS
Year 2025
Issue 4(73)
Pages 12–17
Type of article RAR
Index UDK 623.746
DOI https://doi.org/10.46864/1995-0470-2025-4-73-12-17
Abstract The process of improving two-stroke engines for unmanned aerial vehicles (UAV) is considered. The cooling system and methods of effective heat removal are analyzed in detail. Traditionally, two-stroke engines use air cooling, which subsequently dissipates excess heat into the environment through the airflow. Such internal combustion engines are relatively simple, lightweight, and cheap. More powerful car engines have a more complex cooling system. Liquid cooling is used here with the use of a heatsink. This makes it possible to significantly increase the area of excess heat dissipation into the environment, the airflow. To increase the airflow, a special fan is turned on. Aircraft engines face a technical contradiction: a powerful engine is needed, but the use of water cooling significantly increases the weight of the aircraft. Some foreign firms, such as Hirth in Germany, offer liquid-cooled engines for medium power. But they are are not widespread. The authors offer a combination of air and liquid cooling. The main heat dissipation is carried out by a blown air stream. If the engine temperature rises above the critical value, rapid heat removal is carried out by liquid cooling through water evaporation. Vaporization requires a lot of heat, which is discharged into the environment with the steam generated. The use of the endothermic phenomenon in vaporization formed the basis of the proposed type of cooling of the UAV engine. During the transition from one state of aggregation (water into steam), the temperature of the substance practically does not change. This makes it possible to stabilize the temperature regime of the engine.
Keywords UAV, heat dissipation, liquid cooling, endothermic phenomenon, two-stroke engine
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